Diff: QTI, QTII, QDII: Mopar synthetic Gear & Axle lubricant SAE 75W-140 (API-GL5) or equivalent with friction modifier additive.
There is a quantity for the Friction modifier you need to add, don't remember off hand, BUT, you should only have to add the friction modifier if you have the ELSD differential, correct??
In the owner manual and user's guide, I've seen this more than once, and there are NOT 100% clear on which differential requires the friction modifier and which do NOT.
Which Drivetrains/4X4 systems have LSD's? I would think you only need to add the friction modifier for the LSD.
A NOTE for those that don't know.
*ATF+4 is NOT dexron II or any other version of ATF's, only use ATF+4, it is Synthetic ATF with a special formulation for Chrysler Transmissions. Chrysler started to retrofit a lot of their transmissions and XFR cases that used to specify Dexron II with ATF+4, so there is an argument that Dexron may work fine in some Commander trans/xfr cases, BUT, you don't know that for sure, Chrysler may have modified those parts and they do really need ATF+4 now. Eitherway, you can find ATF+4 at just about any auto store and even Walmart, and it usually costs the same, or barely more, than other ATF's; So don't risk it, get ATF+4.
The only ATF that I am aware of that states it meets or exceeds ATF+4 specs, that doesn't have ATF+4 on the bottle is AMSOIL's Multi-Vehicle Synthetic ATF. I've always been wary of fluids that claim they are multi-application, BUT, AMSOIL has an outstanding reputation.
Remember, the axle fluid states to use "SYNTHETIC
" if it states that make sure the axle fluid you get, NOT only meets all the other specs but is also SYNTHETIC.